Kathryn Camille Murray, a 28-year-old Spring Branch teacher accused of having sex with a 15-year-old student, had closed her bank account and was planning on going to Mexico when she was arrested this week, prosecutors said on Friday.

"She had indicated to a fellow teacher that she was making plans to go visit her brother who resides in Mexico," said Assistant Harris County District Attorney Denise Oncken.

Murray was fired from Memorial Middle School, where she taught for three years, after allegations arose that she had sex with an eighth-grader on Feb. 11.

"The defendant came over to the student's house while his parents were not there, and they had sex in the complainant's bedroom," Oncken said.

Records show brother was a witness

According to court records, the teen's 12-year-old brother was at the home when the teacher arrived and opened the victim's door about 11:50 p.m. to see a tan bra and used condom on the floor.

The 12-year-old saw his brother on the bed and a figure under the bedding, according to the arrest affidavit.

The 15-year-year allegedly said to the person under the covers, "Mrs. Murray, say hi to (my brother)," to which the person under the sheets said, "Hola."

When Murray left, the 12-year-old said, he did not see her but heard her say "Adios" to the brothers, who are native Spanish speakers.

The teacher left the house about 12:30 a.m., according to court records.

A faculty member reported the incident to the school's principal on Feb. 13, district officials said. Murray was removed from the campus, at 12550 Vindon, that day.

Bail lowered

After Murray agreed to surrender her passport Friday, state District Judge Michael McSpadden lowered her bail from $250,000 to $50,000 for the second-degree felony. If convicted, she could be sentenced to two to 20 years in prison.

If she makes bail, the judge said, Murray will have to wear a GPS monitor and will be barred from contacting the teen or being around anyone under 18 years old.